Color light sensor device for light absorbance measurement device

Abstract

UV-spectrophotometer is light absorbance measurement device. It is used to measure the solution for checking the concentration. However, it is very expensive. This is a problem for the chemical education which doesn't have this device enough for every student. It is not difficult to create the hand-made spectrophotometer. However, it is difficult to get the data same with the spectrophotometer. We design the spectrophotometer which gives the data same with the spectrophotometer. However, the color of solution has specific light absorbance coefficient to each color of light. Therefore, there are 2 things to know for measuring the solution. They are color of light and color of solution. Therefore, the device must have 3 parts, a color light sensor part, a color solution part and a calculation part. This target of this research is the development of the color light sensor part. The light source is a power RGB LED. The light detector uses the color sensor which has 3 color light detector. This sensor measures the light transmitting the solvent (water). The color light sensor part can calculate the light transmitting the solvent (water) in RGB type.